export default class Cache {
    constructor(limit, func, store) {
        this.limit = limit;
        this.func = func;
        this.store = store;
        this.size = 0;
        this.misses = 0;
        this.hits = 0;
        this.store = store || new Map();
    }
    get(key) {
        let value = this.store.get(key);
        if (this.store.has(key)) {
            this.hits++;
            return this.store.get(key);
        }
        else {
            this.misses++;
            value = this.set(key, this.func(key));
        }
        return value;
    }
    set(key, value) {
        if (this.limit > this.size) {
            this.size++;
            this.store.set(key, value);
        }
        return value;
    }
    purge() {
        this.store.clear();
        this.size = 0;
        this.hits = 0;
        this.misses = 0;
    }
}